svn commit: r275495 - stable/10/sys/cam/ctl

[Alexander Motin]

Author: mav
Date: Fri Dec  5 07:25:02 2014
New Revision: 275495
URL: https://svnweb.freebsd.org/changeset/base/275495

Log:
  MFC r274805:
  Make cfiscsi_offline() synchronous, waiting for connections termination
  before return.  This should make ctld restart more clean and predictable.

Modified:
  stable/10/sys/cam/ctl/ctl_frontend_iscsi.c
  stable/10/sys/cam/ctl/ctl_frontend_iscsi.h
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c
==============================================================================
--- stable/10/sys/cam/ctl/ctl_frontend_iscsi.c	Fri Dec  5 07:24:17 2014	(r275494)
+++ stable/10/sys/cam/ctl/ctl_frontend_iscsi.c	Fri Dec  5 07:25:02 2014	(r275495)
@@ -1282,6 +1282,7 @@ cfiscsi_session_delete(struct cfiscsi_se
 
 	mtx_lock(&softc->lock);
 	TAILQ_REMOVE(&softc->sessions, cs, cs_next);
+	cv_signal(&softc->sessions_cv);
 	mtx_unlock(&softc->lock);
 
 	free(cs, M_CFISCSI);
@@ -1298,6 +1299,7 @@ cfiscsi_init(void)
 	bzero(softc, sizeof(*softc));
 	mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF);
 
+	cv_init(&softc->sessions_cv, "cfiscsi_sessions");
 #ifdef ICL_KERNEL_PROXY
 	cv_init(&softc->accept_cv, "cfiscsi_accept");
 #endif
@@ -1382,6 +1384,14 @@ cfiscsi_offline(void *arg)
 		if (cs->cs_target == ct)
 			cfiscsi_session_terminate(cs);
 	}
+	do {
+		TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
+			if (cs->cs_target == ct)
+				break;
+		}
+		if (cs != NULL)
+			cv_wait(&softc->sessions_cv, &softc->lock);
+	} while (cs != NULL && ct->ct_online == 0);
 	mtx_unlock(&softc->lock);
 	if (online > 0)
 		return;

Modified: stable/10/sys/cam/ctl/ctl_frontend_iscsi.h
==============================================================================
--- stable/10/sys/cam/ctl/ctl_frontend_iscsi.h	Fri Dec  5 07:24:17 2014	(r275494)
+++ stable/10/sys/cam/ctl/ctl_frontend_iscsi.h	Fri Dec  5 07:25:02 2014	(r275495)
@@ -115,6 +115,7 @@ struct cfiscsi_softc {
 	unsigned int			last_session_id;
 	TAILQ_HEAD(, cfiscsi_target)	targets;
 	TAILQ_HEAD(, cfiscsi_session)	sessions;
+	struct cv			sessions_cv;
 #ifdef ICL_KERNEL_PROXY
 	struct icl_listen		*listener;
 	struct cv			accept_cv;